Sleeping bag



FIG. 1 is a top plan view of a sleeping bag showing our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top end view thereof; and,

FIG. 6 is a bottom end view.

The broken lines shown throughout the views are understood to represent conventional stitching. 

The ornamental design for a sleeping bag, as shown and described. 